A couple of strays, Canada and Venezuela, questions

I inherited two coins from my mom. One is a 1957 Canadian half dollar, and the other is a 1935 Venezuela something, it says "gram.10" and "lei 835". My questions are:
1. What is the Venezuelan coin?
2. What, if any, is the silver content of these two coins?
TIA
1. What is the Venezuelan coin?
2. What, if any, is the silver content of these two coins?
TIA
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Capped Bust Half Dollars by Variety & Die State Pictorial Refrence